Frozen Pre-Made Pizza Advice

Frozen Pre-Made Pizza Advice

I live in NJ and I am surrounded by small, really good and large variety of Pizza places. I have the chains (Pizza Hut, Dominos) and never order from them. They used to be OK as a pizza substitute but I wouldn't choose one of them over a good pizzeria made pie. Here is my question: My son is getting to the age where after school or with friends he can make himself something to eat, and he keeps asking about frozen pizza. He would like a couple on hand to throw in when friends are over. I have no experience with frozen pre-made pizza and there are a lot of choices. Reading the boxes give no insight to compare. I could use some recommendations, and comparisons. I should just jump in buy one and start comparing, but I though this forum is the place for sound advice. Thanks in advance.

By the way, I had an idea to just freeze the pizzeria slices, but there never seems to be any leftovers to freeze. How does that happen?